The school crest contains much from the life of Pope St. Pius X. On the crest, the winged lion symbolizes St. Mark, the patron Saint of Venice, the city of which Cardinal Sarto was patriarch and cardinal before he became pope. As pope, Pius X retained this symbol for his own coat of arms. It is from this symbol that the school proudly calls itself the "Golden Lions."

Appearing on the coat of arms of both Pius X and the first Archbishop of Atlanta are the waves of the sea. On the saint's coat of arms they represent the seaport of Venice. On the coat of arms of the Archbishop of Atlanta and on our own, they symbolize the city of Atlanta, named from the Atlantic Ocean.

Superimposed on the waves is the anchor of hope, again from the coat of arms of Pius X. At the lower left of the shield is a sword. This is the symbol of the martyrdom of St. Paul from whose First Epistle to the Corinthians Pope Pius X took his motto and from whose Epistle to the Romans the school derives its motto, "Domini Sumus."

Significant colors on the emblem are gold and white, the Papal colors, and with blue, the school colors. The color red symbolizes the martyrdom of the Apostle Paul.

To the left of the emblem is the "chi rho." This can translate to Pius X. Its original meaning, however, is derived from the first two letters of the Greek word for Christ, "christos.".